expr = input()
list = expr.split(" ")
if list[2] == "/" and eval(list[0] + list[2] + list[1]) != eval(list[0] + "//" + list[1]):
    print('%.2f' % eval(list[0] + list[2] + list[1]))
else:
    print('%d' % eval(list[0] + list[2] + list[1]))
